From owner-freebsd-bugs@freebsd.org Sat Feb 9 10:50:18 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7CBA914DDA0E for ; Sat, 9 Feb 2019 10:50:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 11D3D8D7B5 for ; Sat, 9 Feb 2019 10:50:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id C6B8F14DDA0D; Sat, 9 Feb 2019 10:50:17 +0000 (UTC) Delivered-To: bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B230D14DDA0C for ; Sat, 9 Feb 2019 10:50:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3F5D38D7B2 for ; Sat, 9 Feb 2019 10:50:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 7D30A311D for ; Sat, 9 Feb 2019 10:50:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x19AoGM0051258 for ; Sat, 9 Feb 2019 10:50:16 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x19AoGcl051256 for bugs@FreeBSD.org; Sat, 9 Feb 2019 10:50:16 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 235611] Using kcov results in lockup Date: Sat, 09 Feb 2019 10:50:16 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: tuexen@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Feb 2019 10:50:18 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235611 --- Comment #2 from Michael Tuexen --- The problem is that calling clang with -fsanitize-coverage=3Dtrace-pc,trace= -cmp -fno-sanitize=3Dall does not turn off the coverage sanitizer. This can be demonstrated: tuexen@epyc:~ % cat test.c int main(void) { return (0); } tuexen@epyc:~ % cc -fsanitize-coverage=3Dtrace-pc,trace-cmp -o test_1.o -c = test.c tuexen@epyc:~ % cc -fsanitize-coverage=3Dtrace-pc,trace-cmp -fno-sanitize-coverage=3Dtrace-pc,trace-cmp -o test_2.o -c test.c tuexen@epyc:~ % cc -fsanitize-coverage=3Dtrace-pc,trace-cmp -fno-sanitize= =3Dall -o test_3.o -c test.c tuexen@epyc:~ % ls -l test_?.o -rw-r--r-- 1 tuexen wheel 1928 Feb 9 11:44 test_1.o -rw-r--r-- 1 tuexen wheel 1016 Feb 9 11:44 test_2.o -rw-r--r-- 1 tuexen wheel 1928 Feb 9 11:44 test_3.o tuexen@epyc:~ % diff test_1.o test_3.o So wither this is a bug in clang or you can't use -fno-sanitize=3Dall to tu= rn off the coverage sanitizers. --=20 You are receiving this mail because: You are the assignee for the bug.=